Apple Motion 5.1.1 - Manual (Page 770)

Chapter 19 Filters 770
The Color Balance filter lets you adjust the relative balance of all three color channels of an
image at once—for example, lowering the blue channel and raising the red and green channels
to reduce blue tinting and yield an image that appears more orange and warm.
Color balance also relates to color temperature, which describes the quality of light in an image.
For example, sunlight is generally more bluish than tungsten light, which is more orange. In
professional film and video productions, white-balancing the camera before shooting usually
ensures that whites in an image are neutral (with all three color channels balanced evenly).
However, film stocks, optical filters, and digital white-balance settings can modify the tint of
an image.
Note: The imbalanced color channels caused by a dominant color temperature in the lighting of
an image is often referred to as a color cast.
You can use the Color Balance filter to adjust the three color channels of an image to eliminate a
color cast or introduce one. Here are some uses for the Color Balance filter:
•
To correct problems in lighting—for example, rebalancing an image that’s too orange to
appear more neutral.
•
To match two images to one another—for example, matching the quality of light on an actor
in a foreground green screen clip to the lighting in a background image.
•
To stylize the color of an image used in a creative composition—for example, creating a high-
contrast, blue-tinted silhouette from the image of two actors dancing for a title sequence.
The Color Balance filter doesn’t just let you rebalance the overall strength of an image’s three
color channels, it also lets you rebalance color specifically in three tonal zones of an image:
shadows, midtones, and highlight. Three correspondingly named color controls let you make
color balance adjustments in each zone of image tonality.
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